Developer Java Web Sr

Lumen Solutions Inc.
Washington, United States of America
2 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English
Experience level
Senior

Job location

Washington, United States of America

Tech stack

Java
API
Amazon Web Services (AWS)
Amazon Web Services (AWS)
JIRA
Batch Processing
Big Data
Code Review
Information Systems
Continuous Integration
Data Security
Serialization
Data Synchronization
DevOps
Distributed Systems
JSON
PostgreSQL
Enterprise Messaging Systems
Virtual Desktops
OAuth
OpenID
Performance Tuning
Query Optimization
Release Management
Azure
Software Deployment
Software Engineering
SonarQube
Systems Integration
Web Applications
Java Application Server
Enterprise Software Applications
Sql Optimization
Delivery Pipeline
Database Optimization
Spring-boot
Software Security
Indexer
Backend
GIT
Cloudformation
Event Driven Architecture
Angular
Information Technology
Deployment Automation
Avro
Amazon Web Services (AWS)
Enterprise Integration
Kafka
Bitbucket
Operational Systems
Cloudwatch
Api Gateway
REST
Domain Driven Design
Splunk
Data Pipelines
Dynatrace
Jenkins
Microservices

Job description

(Other duties may be assigned)

  • Design, develop, and maintain enterprise-grade backend services and APIs supporting train consist management, yard management, equipment management, scheduling, and operational workflows.
  • Lead backend development efforts using Java, Spring Boot, REST APIs, and event-driven architectures.
  • Design, develop, and support Kafka-based event-driven integrations, producers, consumers, and messaging workflows.
  • Design and implement scalable integrations with internal and external systems using APIs, messaging, batch processes, and data pipelines.
  • Perform code reviews, mentor developers, and promote engineering best practices across the team.
  • Develop and maintain high-quality, secure, and performant Java applications following enterprise standards.
  • Design and optimize PostgreSQL database models, queries, indexing strategies, and data access patterns.
  • Develop and support batch processing, scheduling, data synchronization, and reconciliation processes.
  • Collaborate with Product Owners, Architects, UX designers, and business stakeholders to refine requirements and deliver scalable solutions.
  • Participate in application deployment, release planning, production support, performance tuning, and troubleshooting activities.
  • Contribute to cloud-native application development and CI/CD automation in AWS environments.
  • Ensure adherence to security, compliance, observability, and operational excellence standards.

Requirements

  • Bachelor's degree in Computer Science, Information Systems, Engineering, or related field, or equivalent practical experience.

  • 8+ years of hands-on experience developing enterprise applications using Java.

  • 5+ years of experience with Spring Boot, REST APIs, and microservice-based architectures.

  • 3+ years of hands-on experience developing solutions with Apache Kafka.

  • Experience designing event-driven architectures using Kafka and messaging platforms.

  • Experience building, deploying, and troubleshooting Kafka producers and consumers.

  • Understanding of Kafka topics, partitions, consumer groups, offsets, retries, and message delivery patterns.

  • Strong experience designing and implementing integration solutions between enterprise systems.

  • Strong experience with PostgreSQL database design, SQL optimization, indexing, data modeling, and query tuning.

  • Experience building and consuming RESTful APIs and integrating with external systems.

  • Hands-on experience with AWS services such as: o ECS/Fargate o API Gateway o Lambda o S3 o CloudWatch o Secrets Manager o CloudFormation o CodePipeline o CodeBuild o ECR

  • Experience with Angular and modern web application architectures.

  • Experience developing batch processing and scheduler-based applications.

  • Strong understanding of event-driven design, domain-driven design, and distributed system patterns.

  • Experience with CI/CD and DevOps practices using tools such as Git, Jenkins, Bitbucket, Jira, SonarQube, and automated deployment pipelines.

  • Experience working in Agile/Scrum development environments.

  • Strong analytical, troubleshooting, communication, and collaboration skills.

Preferred Qualifications:

  • Experience with transportation, logistics, railroad, scheduling, asset management, or operational systems.
  • Experience with OAuth2/OIDC, Azure Entra ID (Azure AD), SSO, and application security best practices.
  • Experience supporting production applications in AWS cloud environments.
  • Experience with Dynatrace, CloudWatch, Splunk, or similar monitoring and observability platforms.
  • Experience designing highly available and scalable enterprise solutions.
  • Kafka administration experience, including topic management, monitoring, performance tuning, and troubleshooting.
  • Experience with Schema Registry, message serialization (Avro/JSON), and Kafka ecosystem tooling.
  • Experience with large-scale data ingestion, reconciliation, and operational reporting systems.

Lumen and / or its clients will not provide equipment (Laptop, monitor, etc.) to the selected contractor. The contractor must have their own equipment. Access to a virtual desktop set up (software) will be provided by Lumen's client, allowing the user access to the required systems and technology.

Apply for this position